package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishPageQueryDTO;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.DishVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;
import java.util.Set;

@Service
public class SetmealServiceImpl implements SetmealService {
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 套餐分页查询
     * @param
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 新增套餐
     * @param setmealDTO
     */
    public void saveWithFlavor(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();

        BeanUtils.copyProperties(setmealDTO, setmeal);

        //向菜品表插入一条数据

        setmealMapper.insert(setmeal);

        //获取insert语句生成的主键值
        Long setmealId = setmeal.getId();
        List<SetmealDish> dish = setmealDTO.getSetmealDishes();
        if (dish != null && dish.size() > 0) {
            dish.forEach(dishFlavor -> {
                dishFlavor.setSetmealId(setmealId);
            });
            //向口味表插入n条数据
            setmealDishMapper.insertBatch(dish);
        }
    }


    /**
     * 启售禁售套餐
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        Setmeal setmeal = Setmeal.builder()
                .status(status)
                .id(id)
                .build();

        setmealMapper.update(setmeal);
    }

    /**
     * 根据id主键查询套餐
     * @param id
     * @return
     */
    @Override
    public SetmealVO getByIdWithDish(Long id) {
        //根据id查询套餐数据
        Setmeal setmeal = setmealMapper.getById(id);

        //根据套餐id查询菜品数据
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

        //将查询到的数据封装到VO
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal,setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }
    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id修改套餐的基本信息和菜品信息
     * @param setmealDTO
     */
    public void updateWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //修改套餐表基本信息
        setmealMapper.update(setmeal);

        //删除原有的菜品数据
        setmealDishMapper.deleteBySetmealId(setmealDTO.getId());
        //重新插入菜品数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if(setmealDishes != null && setmealDishes.size() > 0){
            setmealDishes.forEach(dish -> {
                dish.setSetmealId(setmealDTO.getId());
            });
            //向套餐菜品表中插入n条数据
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    public void deleteBatch(List<Long> ids) {
        //判断当前套餐能否被删除 -- 是否存在起售中的套餐
        for(Long id : ids){
            Setmeal setmeal = setmealMapper.getById(id);
            if(setmeal.getStatus() == StatusConstant.ENABLE) {
                //当前套餐处在起售中，不可以删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }
        //根据套餐id集合批量删除套餐数据
        setmealMapper.deleteByIds(ids);
    }


}
